CN105195704B - Centrifugal casting mold composite end cover and method for carrying out composite roll centrifugal casting through same - Google Patents
Centrifugal casting mold composite end cover and method for carrying out composite roll centrifugal casting through same Download PDFInfo
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- CN105195704B CN105195704B CN201510058362.0A CN201510058362A CN105195704B CN 105195704 B CN105195704 B CN 105195704B CN 201510058362 A CN201510058362 A CN 201510058362A CN 105195704 B CN105195704 B CN 105195704B
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- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 77
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005266 casting Methods 0.000 claims abstract description 92
- 239000002184 metal Substances 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 56
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000003110 molding sand Substances 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 16
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 238000011081 inoculation Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000005058 metal casting Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
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- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 8
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- 238000007711 solidification Methods 0.000 description 4
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- 230000008719 thickening Effects 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
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- 230000035699 permeability Effects 0.000 description 2
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a centrifugal casting mold composite end cover and a method for carrying out composite roll centrifugal casting through the same. The centrifugal casting mold composite end cover comprises a casting mold end cover and an additional end cover. The casting mold end cover and the additional end cover are movably connected through a rotary buckle device composed of screw holes, bolts and protruding clamping openings. The method for carrying out composite roll centrifugal casting through the centrifugal casting mold composite end cover comprises the steps that the centrifugal casting mold composite end cover is installed at the two ends of a metal cast mold, a thickened roll working layer is centrifugally cast, and the roll core portion and neck are statically cast in a mold assembling mode after the additional end cover is dismantled, wherein the specific steps comprise casting sand preparation, casting tool preparation and preheating, metal casting mold coating, liquid metal treatment, working layer centrifugal casting, static casting of the core potion and roll neck, and cooling machining. The centrifugal casting mold composite end cover and the method for carrying out composite roll centrifugal casting through the same have the advantages that installation is easy and convenient, the thickened working layer is formed during centrifugal casting, the roll service life is prolonged, the rejection rate and cost are reduced, and meanwhile casting and machining of the roll core portion and neck are not affected.
Description
Technical field
The present invention relates to centrifugal casting technique field, particularly a kind of centrifugal casting mould combined type end cap and carried out using it multiple
The method for closing roll centrifugal casting.
Background technology
Centrifugal casting can make foundry goods coagulation forming under the influence of centrifugal force, be widely used in the production of various foundry goods, especially
It is applied to the production of composite roll.Common composite roll refers to what is be made up of roll working lining and core (including roll neck part)
Roll, part composite roll also includes the transition zone being located between working lining and core.Composite roll can meet milling train to rolling
The requirement of the performances such as roller working lining wearability, thermal fatigue resistance, while in turn ensure that the obdurability of core and roll neck.Composite roll exists
Process conditions are consumed as main in rolling process, the working lining of its mainly body of roll for consuming.Under normal circumstances composite roll makes
When using condemning limit (i.e. working lining runs out of) or when there is larger defect, roll is just overall to be scrapped, and roller core part is pressed
According to steel scrap process, very big is affected on rolling cost.
At present in composite roll centrifugal casting technique, common casting mold end cap is installed at centrifugal casting mould two ends, only with closure
Effect, can prevent liquid metal from splashing, single function.Composite roll centrifugal casting is carried out using existing common casting mold end cap
Method, the composite roller operational layer produced is generally than relatively thin, it is impossible to meet the need of the Rolling production of needs roll thick working layer
Ask, roll consumption is accelerated, scrappage increases, and improves rolling cost；Simultaneously above-mentioned casting method works to increase composite roll
The high temperature abrasion resistance of layer, high rigidity carbide formers is added in working lining mould material and adds the anti-tempering of raising matrix stable
Property element, increased production cost.
The content of the invention
Goal of the invention：For the problems referred to above, it is an object of the invention to provide a kind of centrifugal casting mould combined type easy for installation
End cap, while providing a kind of method for carrying out composite roll centrifugal casting using this centrifugal casting mould combined type end cap, increase is rolled
The thickness of roller working lining, while not interfering with the casting of core of the roll and roll neck.
Technical scheme：A kind of centrifugal casting mould combined type end cap, including casting mold end cap, the casting mold end cap passes through pin fastener
At the two ends of metal mold, also including additional end cap, the additional end cap is placed in the top of the casting mold end cap, sets between the two
There is rotary buckle device, the additional end cap is flexibly connected with the casting mold end cap.
Further, the rotary buckle device includes screw, bolt and protrusion bayonet socket, and the screw is symmetrically arranged at described
The both sides of casting mold end cap, the protrusion bayonet socket is fixed on the both sides of the additional end cap, and around the additional end cap main shaft into
Central Symmetry, one end of the bolt is threadedly coupled with the screw, and the other end engages fastening with the protrusion bayonet socket.
After the protrusion bayonet socket on additional end cap one side rotates 180 ° around the main shaft of additional end cap, can protrusion corresponding with another side
Bayonet socket overlaps, and two protrusion bayonet sockets are in a center of symmetry.One end of bolt is threadedly coupled with the screw on casting mold end cap, additional end cap
Casting mold end cap top is placed in, by additional end cap integral-rotation, the protrusion bayonet socket on both sides engages fastening with the other end of bolt respectively,
Additional end cap and casting mold end cap connection composition centrifugal casting mould combined type end cap, the casting mold end cap of lower section is set to make combined type by pin
End cap is integrally securedly mounted to the two ends of metal mold；By additional end cap integral inverted to rotation, release protrusion bayonet socket and bolt
Fastening state, additional end cap integrally loosens and separates with casting mold end cap.
Further, less than the diameter of the casting mold end cap, the additional end cap central authorities set the diameter of the additional end cap
There is through hole A, the casting mold end cap central authorities are provided with through hole B, and the through hole A is connected with the through hole B, and the through hole A's is straight
Diameter of the footpath less than the through hole B.
The method for carrying out composite roll centrifugal casting using the centrifugal casting mould combined type end cap, at the two ends of metal mold
The centrifugal casting mould combined type end cap is installed, the roll working lining that centrifugal casting thickeies, after removing additional end cap, mould assembling static state is poured
Note core of the roll and roll neck.
Further, methods described specifically includes following steps：
Step (1), molding sand are prepared：By following percentage by weight proportioning molding sand each component：It is broken sieve after old sand 70%,
Fresh sand 22%, binding agent 8%, by each component in puddle mixer mixed grind 5-10 minute；
Step (2), founder true up standby and preheating：Prepare metal mold, casting mold end cap, additional end cap, top box and under casing；
The sand molding top box prepared in the step (1) and under casing, after the completion of dry 2-4 hours at 300-400 DEG C；The step
(1) in prepare sand molding casting mold end cap and additional end cap, after the completion of 150-200 DEG C toast 1-2 hours, by casting mold end cap
With additional end cap connection composition centrifugal casting mould combined type end cap；160-250 DEG C of baking preheating 1-2 hour of metal mold；
Step (3), metal mold coating：Centrifugal casting mould combined type end cap is installed into while hot metal mold two after preheat
End, then be attached to immediately on centrifugal casting machine, centrifugal rotational speed is 300-600 rev/min, and coating is suspended to metal mold inwall
On, paint thickness 2-3 millimeters, and coating thickness is uniform, when precoated sand color inclined dark reddish brown, completes coating process；
Step (4), liquid metal process：Electric furnace difference melting working lining, core and roll neck liquid metal, are carried out at desulfurization
Reason, inoculation and spheroidising, further to improve the quality of liquid metal；
Step (5), centrifugal casting working lining：Before centrifugal casting working lining, check whether the die cavity of metal mold is clean, use
Compressed air blows off die cavity, and centrifugal casting working lining liquid metal, centrifugal rotational speed is 700-1000 rev/min, and pouring temperature is
1320-1400 DEG C, when reaching required cast thickness, stop cast, centrifugation operating is stopped when working lining metal all solidifies；
Step (6), static casting core and roll neck：After metal mold shuts down, additional end cap is removed, retain casting mold
End cap, is rapidly installed to metal mold in the under casing in pouring pit, and carries out mould assembling, static casting core and roll neck with top box
Liquid metal, pouring temperature is 1360-1500 DEG C；
Step (7), cooling processing：The composite roll for pouring core and roll neck stands cooling 24-48 in metal mold
Hour, the composite roll is put in hole after unpacking continues to be slowly cooled to room temperature, casting process is completed, then carry out follow-up
Processing.
Further, the old sand and fresh sand in the step (1) is quartz sand, and binding agent is potter's clay.Molding sand is in casting
In the Modeling Material that is configured in proportion, the molding sand for preparing has viscosity, plasticity, high intensity, fire resistance, gas permeability and moves back
Allowing property.
Further, in the step (2) after moulding top box and under casing is dried, moisture weight percentage is less than 5%, goes out
Furnace temperature is less than 50 DEG C.
Further, in the step (2) after molding molds end cap and additional end cap is toasted, tapping temperature is less than 50
℃；After metal mold baking preheating, tapping temperature is 160-250 DEG C.Metal mold is preheated before cast so as to which temperature is gradually carried
Height, abundant soaking reduces the chilling action to liquid metal, while also slowing down the heat shock to metal mold, protects metal mold,
Improve casting quality.
Before centrifugal casting roll working lining, additional end cap rotation is connected composition centrifugal casting mould combined type end with casting mold end cap
Lid, combined type end cap is arranged on the two ends of metal mold by pin, and the diameter of additional end cap is less than the diameter of casting mold end cap,
The through hole A in additional end cap central authorities is connected with the through hole B in casting mold end cap central authorities, and diameter of the diameter of through hole A less than through hole B；
During sand molding, molding sand covers the internal layer of through hole B, and the joint face along additional end cap and casting mold end cap extends, and terminates at through hole A
Outer layer, increased filling area of the working lining liquid metal in metal mold, working lining liquid metal centrifugal casting enters gold
In category casting mold, centrifugal rotational speed is 700-1000 rev/min, and pouring temperature is 1320-1400 DEG C, and liquid metal edge is covered to through hole
The molding sand added metal casting mold of A outer layers simultaneously solidifies the working lining to form thickening；After the working lining castable solidification of thickening, stop
Operating metal mold, reversely rotates additional end cap and is simultaneously removed, and retains casting mold end cap, then mould assembling operation static casting core and
Roll neck liquid metal, pouring temperature is 1360-1500 DEG C, and solidification forms composite roll, is reprocessed after cooling.
Beneficial effect：Compared with prior art, it is an advantage of the invention that：First, additional end cap is connected into casting mold end cap
For centrifugal casting mould combined type end cap, by towards the additional end cap of different directions integral-rotation, making the protrusion bayonet socket at additional end cap two ends
Fasten or release with the bolt engaging on casting mold end cap and separate, you can complete the installation or dismounting of additional end cap, side simple to operate
Just；Second, the combined type end cap that additional end cap and casting mold end cap are connected into increased working lining liquid metal in metal mold
Filling area, the method for carrying out composite roll centrifugal casting with centrifugal casting mould combined type end cap, in centrifugal casting formed plus
Thick roll working lining, meets the demands such as Rolling production, extends the service life of roll, reduces scrappage and rolling cost, increases
The competitiveness of product in market is added；3rd, after working lining solidification, stop the operating of metal mold, additional end cap is removed, retain casting
Type end cap, then mould assembling static casting core of the roll and roll neck, formed plus do not interfered with while thick working layer core of the roll and
The casting of roll neck and processing dimension.
Description of the drawings
Fig. 1 is the structure sectional view of casting mold end cap；
Fig. 2 is the top view of casting mold end cap；
Fig. 3 is the structure sectional view of additional end cap；
Fig. 4 is the top view of additional end cap；
Fig. 5 is the structure sectional view that additional end cap and casting mold end cap connect into centrifugal casting mould combined type end cap；
Fig. 6 is the top view of centrifugal casting mould combined type end cap；
Fig. 7 is the structure sectional view of sand molding centrifugal casting mould combined type end cap；
Fig. 8 is the overall structure section view that the centrifugal casting mould combined type end cap after sand molding is arranged on metal mold two ends
Figure；
Fig. 9 is the overall structure sectional view for removing metal mold mould assembling after additional end cap.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than restriction the scope of the present invention, after the present invention has been read, those skilled in the art are each to the present invention's
The modification for planting the equivalent form of value falls within the application claims limited range.
As shown in accompanying drawing 1-8, a kind of centrifugal casting mould combined type end cap, including casting mold end cap 1 and additional end cap 4, additional terminals
Lid 4 is placed in the top of casting mold end cap 1, is flexibly connected by rotary buckle device between the two.The rotary buckle device includes number
Amount mutually corresponding screw 5, bolt 6 and protrusion bayonet socket 7.Screw 5 is symmetrically arranged at the both sides of casting mold end cap 1, and protrusion bayonet socket 7 is fixed
On the both sides of additional end cap 4, after wherein the protrusion bayonet socket 7 on one side rotates 180 ° around the main shaft of additional end cap 4, can be with another side
Correspondence protrusion bayonet socket 7 overlaps, and two protrusion bayonet sockets 7 are in a center of symmetry.The screw thread of screw 5 on one end of bolt 6 and casting mold end cap 1
Connection, additional end cap 4 is placed on casting mold end cap 1, the additional end cap 4 of integral-rotation, the protrusion bayonet socket 7 on both sides respectively with bolt 6
Other end engaging fastening, make additional end cap 4 and casting mold end cap 1 form connection, constitute centrifugal casting mould combined type end cap；Will be additional
End cap 4 is overall to be reversely rotated, and makes protrusion bayonet socket 7 and the engagement release state of bolt 6, the overall loosening of additional end cap 4 and with casting mold end
Lid 1 is separated, and removes additional end cap 4.
As shown in accompanying drawing 1-8, the diameter of additional end cap 4 is less than the diameter of casting mold end cap 1, and the central authorities of additional end cap 4 are provided with logical
Hole A 8, the central authorities of casting mold end cap 1 are provided with through hole B 9, and the diameter of through hole A 8 is less than the diameter of through hole B 9, and both are connected.Type
When the molding molds end cap 1 of sand 10 and additional end cap 4, molding sand 10 covers the internal layer of through hole B 9, and along additional end cap 4 and casting mold end
The joint face of lid 1 extends, and terminates at the outer layer of through hole A 8.Casting mold end cap 1 in centrifugal casting mould combined type end cap passes through pin 2
The combined type end cap after the moulding of molding sand 10 is set integrally to be fastened on the two ends of metal mold 3, centrifugal casting mould combined type end cap increased
Filling area of the liquid metal in metal mold 3, under the influence of centrifugal force, liquid metal edge is covered to the outer layers of through hole A 8
The added metal casting mold 3 of molding sand 10 and solidify the working lining to form thickening.
The method for carrying out composite roll centrifugal casting using centrifugal casting mould combined type end cap, pacifies at the two ends of metal mold 3
Dress centrifugal casting mould combined type end cap, the roll working lining that centrifugal casting thickeies, after removing additional end cap 4, mould assembling static casting is rolled
Roller core portion and roll neck.
The method specifically includes following steps：
Step (1), molding sand 10 are prepared：By the following each component of percentage by weight proportioning molding sand 10：Crush the old stone after sieving
Sand 70%, new quartz sand 22%, potter's clay 8%, by each component in puddle mixer mixed grind 5-10 minute.Molding sand 10 is in casting
The Modeling Material being configured in proportion, the quality of molding sand 10 directly affects the quality of the foundry goods such as roll, and the molding sand 10 for preparing has
Toughness, plasticity, high intensity, fire resistance, gas permeability and deformability.
Step (2), founder true up standby and preheating：Prepare metal mold 3, casting mold end cap 1, additional end cap 4, top box and bottom
Case；The moulding top box of molding sand 10 prepared in step (1) and under casing, after the completion of dry 2-4 hours, water after drying at 300-400 DEG C
Percentage by weight is divided to be less than 5%, tapping temperature is less than 50 DEG C；The molding molds end cap 1 of molding sand 10 prepared in step (1) and additional
End cap 4, after the completion of toast 1-2 hours at 150-200 DEG C, tapping temperature is less than 50 DEG C after baking, additional as shown in accompanying drawing 7-8
The integral-rotation of end cap 4 is simultaneously connected composition centrifugal casting mould combined type end cap with casting mold end cap 1, and the diameter of additional end cap 4 is less than casting mold
The diameter of end cap 1, the diameter of through hole A 8 is less than the diameter of through hole B 9, and during 10 moulding of molding sand, molding sand 10 covers the interior of through hole B 9
Layer, and along the joint face extension of additional end cap 4 and casting mold end cap 1, terminate at the outer layer of through hole A 8；Metal mold 3 is in 160-
250 DEG C of baking preheating 1-2 hours, tapping temperature is 160-250 DEG C.Metal mold 3 is preheated before cast so as to which temperature is gradually carried
Height, abundant soaking reduces the chilling action to liquid metal, while also slowing down the heat shock to metal mold 3, and then protects metal
Casting mold 3, improves casting quality.
Step (3), the coating of metal mold 3：Centrifugal casting mould combined type end cap is securedly mounted to while hot by preheating by pin
The two ends of metal mold 3 afterwards, then be attached to immediately on centrifugal casting machine, centrifugal rotational speed is 300-600 rev/min, and coating is hung
To on the inwall of metal mold 3, paint thickness 2-3 millimeters, and coating thickness is uniform, when precoated sand color inclined dark reddish brown, completes to apply
Material process.The effect of coating is to make high temperature fluent metal be not directly contacted with metal mold 3, is shielded, and is delayed to metal casting
The impact and heat effect of type 3, extends its service life；Simultaneously aperture, crackle present on metal mold 3 are filled and led up, in order to avoid choke with resentment,
Prevent roll from producing pore, be conducive to the discharge of gas, improve the solidification situation and casting quality of roll.
Step (4), liquid metal process：Electric furnace difference melting working lining, core and roll neck liquid metal, are carried out at desulfurization
Reason and inoculation, are also performed to if necessary spheroidising, further to improve the quality of liquid metal.
Step (5), centrifugal casting working lining：Before centrifugal casting working lining, first check whether the die cavity of metal mold 3 is done
Only, die cavity, centrifugal casting working lining liquid metal are blown off with compressed air, centrifugal rotational speed is 700-1000 rev/min, cast temperature
Spend for 1320-1400 DEG C, when reaching required cast thickness, stop cast, centrifugation fortune is stopped when working lining metal all solidifies
Turn.
Step (6), static casting core and roll neck：After metal mold 3 shuts down, the overall reversely rotation of additional end cap 4
Turn, engagement release state is simultaneously separated with casting mold end cap 1, as shown in Figure 9, remove additional end cap 4, retain casting mold end cap 1, gold
Category casting mold 3 is installed to rapidly in the under casing in pouring pit, and carries out mould assembling, static casting core and roll neck liquid gold with top box
Category, pouring temperature is 1360-1500 DEG C.
Step (7), cooling processing：The composite roll for pouring core and roll neck stands cooling 24-48 in metal mold 3
Hour, the composite roll is put in hole after unpacking continues to be slowly cooled to room temperature, casting process is completed, then carry out follow-up adding
Work.
Centrifugal casting mould combined type end cap in the present invention, including casting mold end cap 1 and additional end cap 4, both are flexibly connected, whole
Body rotates additional end cap 4 and is capable of achieving the connection with casting mold end cap 1 or separates, easy to operate；With centrifugal casting mould combined type end cap
The centrifugal casting of composite roll is carried out, centrifugal casting mould combined type end cap is arranged on the two ends of metal mold 3, increased liquid metal
Filling area in metal mold 3, the roll working lining for thickening is formed in centrifugal casting, without the need for adding wear-resisting material,
The service life of roll is extended, scrappage and rolling cost is reduced, and removes attached before static casting core of the roll and roll neck
Plus end cap 4, retain casting mold end cap 1, the casting of core of the roll and roll neck is not interfered with while being formed and adding thick working layer and is added
Chinese musical scale cun, meets Production requirement.
Claims (7)
1. a kind of centrifugal casting mould combined type end cap, including casting mold end cap (1), the casting mold end cap (1) is fastened on by pin (2)
The two ends of metal mold (3), it is characterised in that：Also include additional end cap (4), the additional end cap (4) is placed in the casting mold end
The top of lid (1), is provided between the two rotary buckle device, makes the additional end cap (4) with the casting mold end cap (1) activity even
Connect；Less than the diameter of the casting mold end cap (1), additional end cap (4) central authorities are provided with through hole to the diameter of the additional end cap (4)
A (8), casting mold end cap (1) central authorities are provided with through hole B (9), and the through hole A (8) is connected with the through hole B (9), and described
Diameter of the diameter of through hole A (8) less than the through hole B (9).
2. a kind of centrifugal casting mould combined type end cap according to claim 1, it is characterised in that：The rotary buckle device bag
Screw (5), bolt (6) and protrusion bayonet socket (7) are included, the screw (5) is symmetrically arranged at the both sides of the casting mold end cap (1), described
Protrusion bayonet socket (7) is fixed on the both sides of the additional end cap (4), and, institute in a center of symmetry around the main shaft of the additional end cap (4)
The one end for stating bolt (6) is threadedly coupled with the screw (5), and the other end engages fastening with protrusion bayonet socket (7).
3. usage right requires the method that the arbitrary described centrifugal casting mould combined type end caps of 1-2 carry out composite roll centrifugal casting,
It is characterized in that：The centrifugal casting mould combined type end cap is installed at the two ends of metal mold, the roll work that centrifugal casting thickeies
Layer, after removing additional end cap, mould assembling static casting core of the roll and roll neck.
4. method according to claim 3, it is characterised in that：Specifically include following steps：
Step (1), molding sand are prepared：By following percentage by weight proportioning molding sand each component：Crush the old sand 70%, fresh sand after sieving
22%th, binding agent 8%, by each component in puddle mixer mixed grind 5-10 minute；
Step (2), founder true up standby and preheating：Prepare metal mold, casting mold end cap, additional end cap, top box and under casing；It is described
The sand molding top box prepared in step (1) and under casing, after the completion of dry 2-4 hours at 300-400 DEG C；In the step (1)
The sand molding casting mold end cap and additional end cap of preparation, after the completion of toast 1-2 hours at 150-200 DEG C, by casting mold end cap and attached
Plus end cap connects into centrifugal casting mould combined type end cap；Metal mold is in 160-250 DEG C of baking preheating 1-2 hour；
Step (3), metal mold coating：Centrifugal casting mould combined type end cap is installed into while hot metal mold two ends after preheat,
It is attached to immediately again on centrifuge, centrifugal rotational speed is 300-600 rev/min, and coating is suspended on metal mold inwall, coating is thick
Degree 2-3 millimeters, and coating thickness is uniform, when precoated sand color inclined dark reddish brown, completes coating process；
Step (4), liquid metal process：Electric furnace difference melting working lining, core and roll neck liquid metal, carry out desulfurization process,
Inoculation and spheroidising；
Step (5), centrifugal casting working lining：Before centrifugal casting working lining, first check whether the die cavity of metal mold is clean, with pressure
Contracting air blows off die cavity, and centrifugal casting working lining liquid metal, centrifugal rotational speed is 700-1000 rev/min, and pouring temperature is
1320-1400 DEG C, when reaching required cast thickness, stop cast, centrifugation operating is stopped when working lining metal all solidifies；
Step (6), static casting core and roll neck：After metal mold shuts down, additional end cap is removed, retain casting mold end
Lid, is rapidly installed to metal mold in the under casing in pouring pit, and carries out mould assembling, static casting core and roll neck liquid with top box
State metal, pouring temperature is 1360-1500 DEG C；
Step (7), cooling processing：The composite roll for pouring core and roll neck stands cooling 24-48 hours in metal mold,
The composite roll is put in hole after unpacking continues to be slowly cooled to room temperature, complete casting process, then carry out follow-up processing.
5. method according to claim 4, it is characterised in that：Old sand and fresh sand in the step (1) is quartz sand, is glued
Knot agent is potter's clay.
6. method according to claim 4, it is characterised in that：After moulding top box and under casing drying in the step (2),
Moisture weight percentage is less than 5%, and tapping temperature is less than 50 DEG C.
7. method according to claim 4, it is characterised in that：Molding molds end cap and additional terminals in the step (2)
After lid baking, tapping temperature is less than 50 DEG C；After metal mold baking preheating, tapping temperature is 160-250 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510058362.0A CN105195704B (en) | 2015-02-04 | 2015-02-04 | Centrifugal casting mold composite end cover and method for carrying out composite roll centrifugal casting through same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510058362.0A CN105195704B (en) | 2015-02-04 | 2015-02-04 | Centrifugal casting mold composite end cover and method for carrying out composite roll centrifugal casting through same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105195704A CN105195704A (en) | 2015-12-30 |
| CN105195704B true CN105195704B (en) | 2017-05-17 |
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| CN110227794B (en) * | 2019-06-19 | 2021-03-16 | 江苏翔晟重工有限公司 | Recycling method of used sodium silicate sand |
| CN112705909A (en) * | 2020-11-30 | 2021-04-27 | 中钢集团邢台机械轧辊有限公司 | Manufacturing method of cold mold for disc centrifuge |
| CN112828257A (en) * | 2020-12-29 | 2021-05-25 | 中钢集团邢台机械轧辊有限公司 | Pouring method utilizing end face profiling of centrifugal composite roll collar |
| CN114453569B (en) * | 2021-12-31 | 2023-11-10 | 江苏润孚机械轧辊制造有限公司 | Low-temperature casting equipment for roller processing |
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Effective date of registration: 20201230 Address after: 212000 Yicun, Shangdang Town, Dantu District, Zhenjiang City, Jiangsu Province Patentee after: JIANGSU HUANYU METALLURGICAL TECHNOLOGY Co.,Ltd. Address before: Shangdang Zhen Yi Cun, Dantu District, Zhenjiang City, Jiangsu Province Patentee before: ZHENJIANG DANTU DISTRICT HUANYU ROLLER Co.,Ltd. |
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Denomination of invention: Centrifugal casting composite end cover and method for centrifugal casting of composite rollers using it Granted publication date: 20170517 Pledgee: Limited by Share Ltd. Zhenjiang branch bank China Jingkou Pledgor: JIANGSU HUANYU METALLURGICAL TECHNOLOGY CO.,LTD. Registration number: Y2024980005919 |
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